September 4, 2008
-----------------

The first version (V001) of the Level 2 (L2), Level 3 (L3), and Level
4 (L4) files for the Ohio Oak Openings site (US-Oho) were posted and
cover the period 2004-2005.


April 12, 2012
--------------

The second version (V002) of the L2 files for the US-Oho site were
posted and cover the period 2004 to 2011.  V002 replaces the 2004-2005
data presented in V001 (e.g., corrected PAR data and re-processing of
entire time series).


September 16, 2015
------------------

The third version (V003) of the Level 2 files for the US-Oho site were
posted and cover the period 2004 to 2013.  V003 replaces all previous
versions because previous data (i.e. 2004-2011 data) were reprocessed.


October 9, 2015
---------------

The fourth version (V004) of the Level 2 files for the US-Oho site were
posted and cover the period 2004 to 2013.  PAR data for all years and
soil temperature data for 2007 differ in V004 from V003.  All other data
are unchanged from V003.

Details on the processing performed by CDIAC on the files provided by
Jiquan Chen's team to create the latest L2 files may be found at

ftp://cdiac.ornl.gov/pub/ameriflux/data/Level2/Sites_ByName/Ohio_Oak_Openings/with_gaps/report_Ohio_Oak_Openings.html